/**
 * Software License, Version 1.0
 * 
 * Copyright 2008 The Trustees of Indiana University.  All rights reserved.
 * 
 *
 *Redistribution and use in source and binary forms, with or without 
 *modification, are permitted provided that the following conditions are met:
 *
 *1) All redistributions of source code must retain the above copyright notice,
 * the list of authors in the original source code, this list of conditions and
 * the disclaimer listed in this license;
 *2) All redistributions in binary form must reproduce the above copyright 
 * notice, this list of conditions and the disclaimer listed in this license in
 * the documentation and/or other materials provided with the distribution;
 *3) Any documentation included with all redistributions must include the 
 * following acknowledgment:
 *
 *"This product includes software developed by the Community Grids Lab. For 
 * further information contact the Community Grids Lab at 
 * http://communitygrids.iu.edu/."
 *
 * Alternatively, this acknowledgment may appear in the software itself, and 
 * wherever such third-party acknowledgments normally appear.
 * 
 *4) The name Indiana University or Community Grids Lab or Granules, 
 * shall not be used to endorse or promote products derived from this software 
 * without prior written permission from Indiana University.  For written 
 * permission, please contact the Advanced Research and Technology Institute 
 * ("ARTI") at 351 West 10th Street, Indianapolis, Indiana 46202.
 *5) Products derived from this software may not be called Granules, 
 * nor may Indiana University or Community Grids Lab or Granules appear
 * in their name, without prior written permission of ARTI.
 * 
 *
 * Indiana University provides no reassurances that the source code provided 
 * does not infringe the patent or any other intellectual property rights of 
 * any other entity.  Indiana University disclaims any liability to any 
 * recipient for claims brought by any other entity based on infringement of 
 * intellectual property rights or otherwise.  
 *
 * LICENSEE UNDERSTANDS THAT SOFTWARE IS PROVIDED "AS IS" FOR WHICH NO 
 * WARRANTIES AS TO CAPABILITIES OR ACCURACY ARE MADE. INDIANA UNIVERSITY GIVES
 * NO WARRANTIES AND MAKES NO REPRESENTATION THAT SOFTWARE IS FREE OF 
 * INFRINGEMENT OF THIRD PARTY PATENT, COPYRIGHT, OR OTHER PROPRIETARY RIGHTS. 
 * INDIANA UNIVERSITY MAKES NO WARRANTIES THAT SOFTWARE IS FREE FROM "BUGS", 
 * "VIRUSES", "TROJAN HORSES", "TRAP DOORS", "WORMS", OR OTHER HARMFUL CODE.  
 * LICENSEE ASSUMES THE ENTIRE RISK AS TO THE PERFORMANCE OF SOFTWARE AND/OR 
 * ASSOCIATED MATERIALS, AND TO THE PERFORMANCE AND VALIDITY OF INFORMATION 
 * GENERATED USING SOFTWARE.
 */
package cgl.granules.operation;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;

/**
 * Implements the ExecutionProfile. Includes support for configuring the various
 * fields in the execution profile.
 * 
 * @author Shrideep Pallickara
 * 
 */
public class ExecutionProfileSetup implements ExecutionProfile {
	private String operationBinding;
	private long executionInterval = 0;
	private int numberOfTimesToExecute = 0;
	private boolean executeOnce = true;
	private boolean executePeriodically = false;
	private boolean executeAFixedNumberOfTimes = false;
	private boolean executeWhenDataAvailable = false;
	private boolean stayAlive = false;

	public ExecutionProfileSetup(String operationBinding) {
		this.operationBinding = operationBinding;
	}

	public ExecutionProfileSetup(byte[] marshalledBytes) throws IOException {
		ByteArrayInputStream baInputStream = new ByteArrayInputStream(
				marshalledBytes);
		DataInputStream din = new DataInputStream(baInputStream);

		int bindingLength = din.readInt();
		byte[] operationBindingBytes = new byte[bindingLength];

		din.readFully(operationBindingBytes);
		operationBinding = new String(operationBindingBytes);

		executeOnce = din.readBoolean();
		stayAlive = din.readBoolean();
		executeWhenDataAvailable = din.readBoolean();

		executeAFixedNumberOfTimes = din.readBoolean();
		if (executeAFixedNumberOfTimes) {
			numberOfTimesToExecute = din.readInt();
		}

		executePeriodically = din.readBoolean();
		if (executePeriodically) {
			executionInterval = din.readLong();
		}
	}

	public byte[] getBytes() throws IOException {
		byte[] marshalledBytes = null;
		ByteArrayOutputStream baOutputStream = new ByteArrayOutputStream();
		DataOutputStream dout = new DataOutputStream(baOutputStream);

		int bindingLength = operationBinding.length();
		dout.writeInt(bindingLength);
		dout.write(operationBinding.getBytes());

		dout.writeBoolean(executeOnce);
		dout.writeBoolean(stayAlive);
		dout.writeBoolean(executeWhenDataAvailable);

		dout.writeBoolean(executeAFixedNumberOfTimes);
		if (executeAFixedNumberOfTimes) {
			dout.writeInt(numberOfTimesToExecute);
		}

		dout.writeBoolean(executePeriodically);
		if (executePeriodically) {
			dout.writeLong(executionInterval);
		}

		dout.flush();
		marshalledBytes = baOutputStream.toByteArray();
		return marshalledBytes;
	}

	public void setAsExecuteOnce(String binding) {
		if (!passesBindingCheck(binding)) {
			return;
		}
		changeToExecuteOnce();
	}

	public void changeToExecuteOnce() {
		executeOnce = true;
		executePeriodically = false;
		executeAFixedNumberOfTimes = true;
		numberOfTimesToExecute = 0;
		executionInterval = 0;
		stayAlive = false;
	}

	public void setAsExecutePeriodically(String binding, long executionInterval) {
		if (!passesBindingCheck(binding)) {
			return;
		}
		changeToExecutePeriodically(executionInterval);
	}

	public void changeToExecutePeriodically(long executionInterval) {
		executeOnce = false;
		executePeriodically = true;
		this.executionInterval = executionInterval;
	}

	public void setAsExecuteFixedNumberOfTimes(String binding, int numOfTimes) {
		if (!passesBindingCheck(binding)) {
			return;
		}
		changeToExecuteFixedNumberOfTimes(numOfTimes);
	}

	public void changeToExecuteFixedNumberOfTimes(int numOfTimes) {
		executeOnce = false;
		executeAFixedNumberOfTimes = true;
		numberOfTimesToExecute = numOfTimes;
	}

	public void setAsStayAlive(String binding) {
		if (!passesBindingCheck(binding)) {
			return;
		}
		changeToStayAlive();
	}

	public void changeToStayAlive() {
		executeOnce = false;
		executeAFixedNumberOfTimes = false;
	}

	public void setAsExecuteWhenDataAvailable(String binding) {

		if (!passesBindingCheck(binding)) {
			return;
		}
		changeToExecuteWhenDataAvailable();
	}

	public void changeToExecuteWhenDataAvailable() {
		executeWhenDataAvailable = true;
		stayAlive = true;
		executeOnce = false;
		executeAFixedNumberOfTimes = false;
		executePeriodically = false;
		executionInterval = 0;
	}

	@Override
	public long getExecutionInterval() {
		return executionInterval;
	}

	@Override
	public int getNumberOfTimesToExecute() {
		return numberOfTimesToExecute;
	}

	@Override
	public boolean isExcuteAFixedNumberOfTimes() {
		return executeAFixedNumberOfTimes;
	}

	@Override
	public boolean isExecuteOnce() {
		return executeOnce;
	}

	@Override
	public boolean isExecutePeriodically() {
		return executePeriodically;
	}

	@Override
	public boolean isExecuteWhenDataAvailable() {
		return executeWhenDataAvailable;
	}

	@Override
	public boolean isStayAlive() {
		return stayAlive;
	}

	@Override
	public String toString() {
		String stringRepresentation = "executeOnce=" + executeOnce
				+ ", stayAlive=" + stayAlive + ", executeWhenDataAvailable= "
				+ executeWhenDataAvailable + ", executePeriodically="
				+ executePeriodically + ", executionInterval="
				+ executionInterval + ", executeFixedNumberOfTimes="
				+ executeAFixedNumberOfTimes + ", numberOfTimesToExecute="
				+ numberOfTimesToExecute;
		return stringRepresentation;
	}

	/**
	 * Check to see if the method passes a binding check
	 * 
	 * @param binding
	 * @return
	 */
	private boolean passesBindingCheck(String binding) {
		boolean passesCheck = true;
		if (binding != operationBinding) {
			System.out.println("Mismatch in ExecutionProfile binding");
			passesCheck = false;
		}

		return passesCheck;
	}
}
